8:47 PM,
Nov. 15, 2013

Team owner Chip Ganassi poses in 2012 with Dario Franchitti after the Scot's third Indianapolis 500 victory.

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Dario Franchitti couldn't risk another head injury, his IndyCar Series team owner said Friday, explaining why the three-time Indianapolis 500 champion had to retire earlier this week.

"A repeat of that kind of concussion could be serious," Chip Ganassi said in a conference call.

Franchitti suffered a concussion in his Oct. 6 crash in Houston, and while specifics of his injury haven't been revealed, Ganassi said recent neurological tests in Miami led doctors to advise retirement. ...